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| Minotaur Automotive Tuning Software Tune your own 7.3L Diesel! If you have a question or comment about Minotaur? Post it here. Also, check out our Facebook group: Facebook - Minotaur Tuners |
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#1
Fri, April 16th, 2010, 11:13 PM
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What is your minimum IPR duty cycle parameter? What is commanded in the base IPR map? What effect does the ICP have on your PW?
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years. Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim. Last edited by cleatus12r; Sat, April 17th, 2010 at 12:48 AM. Reason: I got my maps backwards..... 
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#3
Fri, April 16th, 2010, 11:34 PM
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Just to be curious, what's the fuel pressure in heads under load? Those injectors have got to tax a lift pump pretty hard.
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#5
Fri, April 16th, 2010, 11:42 PM
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That's a bunch
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#7
Sat, April 17th, 2010, 12:52 AM
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Well after taking yet another look at the PW map it appears I took close to .3 MS away from my Idle range..........I added that back and might give it another try tonight.
I just cannot wrap my head around what that actually did to my ICP/IPR%. 
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#8
Sat, April 17th, 2010, 09:33 AM
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This damn laptop. I had 3 paragraphs written and it thought that it needed to do an automatic "go back to previous page" action...... I need another piece of duct tape over the touchpad. I thought that these things were only supposed to work with a finger touch; not shadows, shirt sleeves, moving air, etc.
Anyway, the condensed version goes like this..... The injectors do have a mechanical threshold that doesn't allow them to inject any fuel at .4-.5 ms. of commanded pulse width. Judging by the map you posted, you might be pretty close to that and you might be losing some efficiency. What is your actual IPR DC % while all of this is going on. I suspect that you may be at about the minimum 5% duty cycle....but with dual IPRs you SHOULD be able to dump ICP at 5% so that is a moot point. Dave, I'm uncertain of what is going on. You absolutely NEED an emulator so I will send you mine when I get to Georgia so you can get all of your issues fixed quickly instead of doing the tune-test-repeat cycle over and over (since I know that that portion of the tuning is the most frustrating because it takes 10 minutes per tune to do it). By the way, the XP disk should be arriving one of these days too. I sent it yesterday.
__________________
Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years. Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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